ELECTROCHLORINATION

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	SEA WATER OR BRACKISH WATER
	BRINE SYSTEMS
	NATURAL OR ADDED SALINITY IN THE WATER
	COMPARISON OF DISINFECTION SYSTEMS

ELECTROCHLORINATION

Over recent years Electrochlorination has gained favour as a safe, reliable and economic method of disinfection. It is well suited to the treatment of drinking water, wastewater, cooling systems and swimming pools. While the capital cost may be a consideration, the significantly lower operating cost and high level of safety means Electrochlorination is appropriate in many instances.

CHLORINE GAS

For many years the preferred product for the disinfection of both drinking and wastewater. Although the effectiveness is well known, the risk of transporting and handling such a hazardous chemical has meant many chlorine gas systems are being phased out in favour of alternate systems such as Electrochlorination.

BULK HYPOCHLORITE

Low capital cost and simplicity are benefits of this system, although there are safety considerations in the transport and storage of this lower risk, but still hazardous chemical. Also, the cost per kg chlorine can be relatively high and the rate of decay needs to be considered.

OZONE

Ozone has long been recognized as an excellent disinfecting agent, although it has virtually no residual effect and ozone gas is extremely toxic. Equipment and operating costs are typically significantly higher than Electrochlorination, although there are a variety of applications where a combined ozone and Electrochlorination system can act in a complimentary fashion.

ULTRAVIOLET

The radiation energy of UV rays can be used to effectively destroy microorganisms, although it must be kept in mind that UV cannot inactivate any organism that can be seen with the human eye, such as Giardia and Cryptosporidium.

High capital cost and high operating and maintenance costs are often a negative of UV systems, although in recent times combined UV / Electrochlorination systems are gaining favour for indoor swimming pools and for a variety of water treatment processes.

CHLORINE DIOXIDE

Chlorine dioxide is an effective, fast acting bacteriacide which has proved effective in killing Giardia and Cryptosporidium. It is well suited to a range of water treatment applications, however it must be generated on site, it is hazardous and it is significantly more expensive than chlorine.